将字符串的前八个字节转换为__int64位整数

__int64 CCtpKernel::ColumnStringToInt64(std::string& strName){__int64 nRet = 0;const char* p = strName.c_str();char* s = (char*)&nRet;for (int i = 0; i < 8 && *p != '\0'; i++){*s = *p;p++;s++;}return nRet;}